Spatial distribution pattern of European hake, Merluccius merluccius (Pisces: Merlucciidae), in the Mediterranean Sea

Author:

Sion LetiziaORCID,Zupa WalterORCID,Calculli CrescenzaORCID,Garofalo GermanaORCID,Hidalgo ManuelORCID,Jadaud AngéliqueORCID,Lefkaditou EvgeniaORCID,Ligas AlessandroORCID,Peristeraki PanagiotaORCID,Bitetto IsabellaORCID,Capezzuto FrancescaORCID,Carlucci RobertoORCID,Esteban AntonioORCID,Follesa CristinaORCID,Guijarro BeatrizORCID,Ikica ZdravkoORCID,Isajlovic IgorORCID,Lembo GiuseppeORCID,Manfredi ChiaraORCID,Pérez José LuisORCID,Porcu CristinaORCID,Thasitis IoannisORCID,Tserpes GeorgeORCID,Carbonara PierluigiORCID

Abstract

The present study provides updated information on the occurrence, abundance and biomass distribution patterns and length frequencies of Merluccius merluccius in the Mediterranean Sea, by analysing a time series of data from the Mediterranean International Trawl Surveys (MEDITS) from 1994 to 2015. The highest values of abundance and biomass were observed in the Sardinian Seas. The use of a generalized additive model, in which standardized biomass indices (kg km–2) were analysed as a function of environmental variables, explained how ecological factors could affect the spatio-temporal distribution of European hake biomass in the basin. High biomass levels predicted by the model were observed especially at 200 m depth and between 14°C and 18°C, highlighting the preference of the species for colder waters. A strong reduction of biomass was observed since the year 2009, probably due to the strengthening of the seasonal thermocline that had greatly reduced the availability of food. The general decrease in biomass of several stocks of anchovy and sardine, preys of European hake, might be indirectly connected to the decreasing biomass detected in the present study. The length analysis shows median values lower than 200 mm total length of most of the investigated areas.

Publisher

Editorial CSIC

Subject

Aquatic Science,Oceanography

Reference1 articles.

1. Who cardiovascular projectiobs 2030

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3